/*
 * Copyright (C) 2009 M. Hautle.
 * 
 * This file is part of TrackedBean.
 * 
 * TrackedBean is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any later version.
 * 
 * TrackedBean is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License along with TrackedBean. If not, see <http://www.gnu.org/licenses/>.
 */
package ch.trackedbean.validator.defaultValidators;

import ch.trackedbean.validator.*;

/**
 * Abstract validator implementing an default message handling.<br>
 * <b>A property validator has to be stateless!</b>
 * 
 * @author M. Hautle
 */
public abstract class AbstractValidator implements IPropertyValidator {
    /** The error description. */
    protected IErrorDescription error;

    /**
     * Validates the given value.
     * 
     * @param value The value to check
     * @return True if the value is valid
     */
    protected abstract boolean isValid(Object value);

    /**
     * {@inheritDoc}
     */
    @Override
    public IErrorDescription validate(Object value) {
        if (isValid(value))
            return null;
        return error;
    }
}
